过度的化物会诱导细胞亡和随后的功能障碍
Yi Zhang1, Zhao Xu2, Pengpeng Xie3
1The Second Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi province, 710061, PR China.
Toxicology letters
|February 26, 2026
概括
慢性过量摄入化物,特别是化 (NaF),会损害功能,并导致大鼠的管状损伤. 这种毒性与内在亡途径的激活有关,涉及Bax,Bcl-2和Caspase-3.
科学领域:
- 毒理学 毒理学 毒理学
- 腎臟病學 (nephrology) 是一種醫學專業.
- 分子生物学分子生物学
背景情况:
- 慢性过度化物暴露是一个全球性的健康问题.
- 了解化物诱导的损伤机制对于公共卫生至关重要.
- 以前的研究表明,化物会影响功能,但分子途径需要进一步阐明.
研究的目的:
- 在大鼠中研究由慢性过度化 (NaF) 暴露引起的损伤和功能障碍的机制.
- 分析化物毒性中亡相关标记物的作用.
- 为了确定化物诱导的损伤所涉及的特定的亡途径.
主要方法:
- 大鼠在饮用水中暴露于不同剂量的NaF,持续时间不同 (2,4,6个月).
- 功能通过血清肌素水平进行评估.
- 脏的结构损伤被评估使用组织病理学.
- 使用qRT-PCR,免疫组织化学和西式斑点测量,量化了亡标记物 (Bax,Bcl-2,Caspase-3).
主要成果:
- 纳米暴露导致了剂量和时间依赖的血清肌氨酸的增加,这表明淋巴膜过功能受损.
- 组织病理学揭示了显著的管状退化.
- 即使在明显的形态变化之前,也观察到功能障碍,这表明早期的功能缺陷.
- 化物暴露诱导了亲细胞灭绝的转变 (增加了Bax,减少了Bcl-2) 并激活了Caspase-3.
- 激活内在 (线粒体) 亡途径被确定为一个关键机制.
结论:
- 慢性过度化物暴露会导致严重的功能障碍和结构损伤.
- 本质性亡途径在化物诱导的毒性中发挥着关键作用.
- 脏的功能缺陷可以在可观察到的病理变化之前发生.
- 这项研究阐明了化物毒性的关键分子途径,有助于毒理风险评估.
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